As this is the Swyama Siddha Hanuman Mantra it does not have to be chanted for a set amount of Mantra Repetitions for with the ability to utilize it. Exclusive worship and rituals and regulations about way, sitting down mat, and counting rosary will not be advisable for chanting this https://www.youtube.com/watch?v=ufkmD95y7fE&t=32s